Enum FetchRequest 

pub enum FetchRequest {
    Fresh,
    FreshNoCache,
    Conditional(Box<Parts>),
}

Describes the type of fetch to perform when the streaming cache orchestrator needs to make a network request.

The streaming run method accepts a callback FnOnce(FetchRequest) -> Fut rather than an impl Middleware, so this enum tells the caller whether to issue a fresh request or a conditional (revalidation) request.

Variants

Fresh

A fresh fetch (cache miss or forced).

FreshNoCache

A fresh fetch where the caller should add cache-control: no-cache to the outgoing request. Used for CacheMode::NoCache to signal upstream caches that they must revalidate.

Conditional(Box<Parts>)

A conditional fetch for revalidation. The contained request::Parts carry the conditional headers (e.g. If-None-Match, If-Modified-Since) that should be merged into the outgoing request before sending it. Callers should replace existing headers of the same name (insert, not append).

Trait Implementations

impl Debug for FetchRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.